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SolaStay® S1

INCI Name: Ethylhexyl Methoxycrylene
Product Code: H044
CAS #: 947753-66-4
Patents: 7,588,702; 7,597,825; 7,713,519; 7,754,191; 7,959,834; 8,070,989; 8,075,808; 8,133,477; 8,257,687; 8,263,050; 8,263,051; 8,268,294; 8,278,332; 8,329,148; 8,431,112. Patents Pending.
Brand: SolaStay®

SolaStay® is a viscous yellow liquid designed for use in skin care and sun care products. It is a highly efficient singlet state quencher for butyl methoxydibenzoylmethane (avobenzone) and ethylhexyl methoxycinnamate (octinoxate). Indeed, it outperforms octocrylene as an avobenzone photostabilizer, photostabilizes octinoxate and avobenzone when formulated together, is an outstanding solvent for crystalline UV filters, is easily emulsified, and is suitable for use in lotion, cream, spray, stick, and gel formulations.

At a recommended use level in sunscreens equal to the weight percentage of avobenzone in the formulation (typically 2-3%), SolaStay® S1 enables new heights of performance in broad spectrum UVA and UVB photoprotection. Used at 1-3% with mineral UV filters and/or cosmetic colorants, it mitigates the photocatalytic and reactive oxygen species-generating activities of these oxides.

SolaStay® S1 has also been documented to substantially photostabilize cholecalciferol, resveratrol, retinol, retinyl palmitate, and ubiquinone, which may be incorporated in skin care products for their anti-photoaging and other benefits. The recommended used level for SolaStay® S1 to photostabilize these products is 3-5%.

Features & Benefits:

  • Sunscreen Active Photostabilizer
  • Anti-aging Ingredient Photostabilizer
  • Sunscreen Solvent
Appearance (25°C) Clear yellowish viscous liquid
Color (Gardner) 9
Odor Mild characteristic
Dielectric Constant (25°C) 12.9
Specific Gravity (25°C/25°C) 1.075
Viscosity (cP, 25°C) 13000
Viscosity (cP, 80°C) 58
Acid Value (mg KOH/g) 0.7
Soluble In
  • Alcohol [Ethanol]
  • Cosmetic Esters
Solvency Of
  • 4-Methylbenzylidene Camphor (Enzacamene) 10%
  • Ethylhexyl Triazone 25%
  • Benzophenone-3 (Oxybenzone) 30%
Toxicology Profile
  • Ames Test: No detectable genotoxic activity in absence or presence of S9 enzyme activation.
  • Ocular / Eye Irritation: Practically no ocular irritation potential in vivo at 20% (HET-CAM).
  • Phototoxicity: Did not induce a response indicative of a photoxic reaction.
  • Repeat Insult Patch Test (Human): Did not indicate a potential for dermal irritation or allergic contact sensitization.
Packaging
  • Drum - 420lbs
  • Pail - 40lbs

Regional Approvals:

  • Canada
  • EU
  • US

Applications:

  • After Sun Skin Care
  • Beach Wear Sun Care
  • Daily Wear Sun Care
  • Facial Color Cosmetics
  • Facial Skin Care

Formulas:

Scroll right to view specs →
Name Regional Acceptance  Formula Number
"No O" Broad Spectrum SPF 30 Cream with SolaStay® S1ASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ8-164B
'Ante-aging' Daily Wear SPF 30 Sunscreen SprayASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ13-51
3-O-Free Olive Daily Wear Sunscreen Spray SPF 30ASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ13-109
Absolute Sunscreen Spray SPF 100ASEAN, Canada, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ11-300
Absolute Sunscreen Spray SPF 50ASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ12-24
Absolute Sunscreen Spray SPF 70ASEAN, Canada, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ11-299B
Anti-Blue Light Daily Primer SPF 30Canada, MERCOSUR, USJZ15-60
Anti-Sand Sunscreen Gel SPF 50ASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ12-20B
Argan-Hemp Sunscreen Milk SPF 30ASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ13-35B
Beach Sunscreen Spray SPF 70ASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ12-167B
Bed Sheet MaskGlobal131-19-03A
Biphasic 3-O-Free Sunscreen Spray SPF 30ASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, Philippines, Taiwan, USJZ13-110
Biphasic Sea Glass Spray SPF 30ASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ13-99
Biphasic Sunscreen Spray SPF 30ASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ12-304
Broad Spectrum Oil-in-Water Sunscreen Cream SPF 70ASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ11-73
Broad Spectrum SPF 45 Sunscreen CreamASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ5-67
Broad Spectrum SPF 50+ Sunscreen CreamMERCOSUR, USJZ6-169
Broad Spectrum Sunscreen Gel SPF 50 PA++++ASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ11-148B
Clear and Natural SPF 30 Sunscreen Stick with Argan and Hemp OilsASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ13-41
Clear SPF 30 PrimerASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ13-75
Daily Wear with Blue Light Protection SPF 30US, Canada, EU, Australia, Taiwan, Japan, Philippines, Korea, ASEAN, MERCOSURJZ13-105
Endless Emotion Day Cream and Second Skin MaskAustralia, EU, Japan, MERCOSUR, USCS15-007-11A
EUphoria Sunscreen SPF 50EUMD21-001-05Z
Everything Bagel with SPF 40ASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ12-20
Fast-Absorbing Sunscreen Spray SPF 50ASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ12-253
Know-rish Yourself Daily Moisturizer SPF 15Australia, Canada, EU, Japan, Korea, USCS20-042-01E
Mineral High UV Protection Cream SPF 50ASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ14-172B
Mineral Only SPF 100, PFA 25 O/W Sunscreen LotionASEAN, Canada, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ11-160
Minerals Only SPF 70, PFA 20 O/W Sunscreen LotionASEAN, Canada, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ11-159
Multifunction Daily Stick SPF 30ASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ14-39
Oh Wow! 50 Lotion - Broad Spectrum O-W SPF 50 SunscreenGlobalRP2-118
Oil Protect You! SPF 30ASEAN, Australia, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, TaiwanJZ15-59
Oil-in-Water Mineral Sunscreen Cream SPF 50ASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ8-204
Oil-in-Water Sunscreen SPF 20ASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ5-12
Outside-NA Sunscreen Lotion SPF 30ASEAN, Australia, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, TaiwanJZ13-273
Pink Biphasic Spray SPF 30 US, Canada, EU, Australia, Taiwan, Japan, Philippines, Korea, New Zealand, ASEAN, MERCOSURJZ14-45
Quench-and-Protect 30 Lotion - Broad Spectrum O-W SPF 30 SunscreenGlobalJZ8-227
Rosy Spray SPF 30Canada, MERCOSUR, USJZ15-61
Save Face SPF 50 MoisturizerASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ14-49B
Sheer Blush Sunscreen Stick SPF 30ASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ14-54
Sheer Daily Wear Mineral Face Lotion SPF 30ASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ14-242
Silken Sunscreen SPF 30EU100-17-07H
SPF 50 Sunscreen StickASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ10-45C
SPF 50 W/O Dream CreamASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ14-15
SPF 50 Water-in-Silicone BB CreamASEAN, Canada, EU, Japan, Korea, MERCOSUR, Philippines, Taiwan, USJZ9-34
SPF 60 ZnO Sunscreen StickASEAN, Canada, Japan, Korea, Philippines, Taiwan, USJZ15-44
Sport Sunscreen SPF 70ASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ12-207B
Sunlight Bluelight Protection SPF 30ASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ13-280
Sunscreen Cream SPF 30ASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, Philippines, Taiwan, USJZ13-269
Sunscreen SPF 50 LotionUSJZ7-116
Sunscreen Stick SPF 50 PA ++++ASEAN, Australia, Canada, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ11-239
Sunscreen Stick SPF 50 PA++++ASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ11-219B
Sunshine Stick SPF 30ASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ13-192
Superior Sunscreen Stick SPF 50 PA ++++ASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ11-245
Three-O-Free Sunscreen Alcohol Spray SPF 30ASEAN, Australia, EU, Japan, MERCOSUR, USJZ8-150
Whoa! 50+ Cream - W/O SPF 50+ Mineral SunscreenGlobalJZ8-215B
Whoa! 50+ Lotion - W-O SPF 50+ Mineral SunscreenGlobalJZ8-229
ZnO Sunscreen SPF 50ASEAN, Australia, Canada, EU, Japan, Korea, MERCOSUR, New Zealand, Philippines, Taiwan, USJZ15-49B
ZnO-Only Sunscreen SPF 50US, Canada, EU, Australia, Taiwan, Japan, Philippines, Korea, New Zealand, ASEAN, MERCOSURJZ14-269B
ZnO-Only Sunscreen SPF 50US, Canada, EU, Australia, Taiwan, Japan, Philippines, Korea, New Zealand, ASEAN, MERCOSURJZ13-272


The information presented herein is believed to be accurate and reliable, but no warranty or guarantee, expressed or implied, is made regarding the information or the performance of any product. Further, nothing contained herein shall be taken as any inducement or recommendation to use, manufacture or sell that may infringe any patents or any other proprietary rights now or hereafter in existence, nor to imply compliance with any regulatory requirements

The Hallstar Company - 120 South Riverside Plaza Suite 1620 - Chicago, IL 60606-3911 USA hallstarbeauty.com